| abstract |
New derivatives of 2 - (3H-oxazolone of formula (I): where: R {sup, 1 is an alkyl group or -NR {sup, 4 R {sup, 5 where R {sup, 4 and R {sup , 5 are each independently hydrogen or an alkyl or benzyl group, R {sup, 2 is a naphthyl, tetrahydronaphthyl group, or an unsubstituted or substituted phenyl group, the substituents being selected from 1 to 3 halogen atoms or alkyl groups , hydroxy, alkoxy, or trifluoromethyl, and R {sup, 3 is hydrogen or an alkyl group. |